US6039552A - Rotary compressor - Google Patents

Rotary compressor Download PDF

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Publication number
US6039552A
US6039552A US09/036,786 US3678698A US6039552A US 6039552 A US6039552 A US 6039552A US 3678698 A US3678698 A US 3678698A US 6039552 A US6039552 A US 6039552A
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rotor
outer rotor
inner rotor
fluid
rotary compressor
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Expired - Fee Related
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US09/036,786
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English (en)
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Kenji Mimura
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/32—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group F04C18/02 and relative reciprocation between the co-operating members

Definitions

  • the present invention relates to a rotary compressor for compressing various types of fluids, for use as pumps or superchargers for internal combustion engines.
  • Such a rotary compressor hitherto known comprises, as described in, e.g., Japanese Utility Model Registration Laid-open Publication No. 59-181284, a casing having an inflow port and an outflow port for a fluid which open on its inner surface, a cylindrical outer rotor rotatably housed in the casing, a cylindrical inner rotor rotatably supported at an eccentric position within the outer rotor, and a plurality of vanes slidably attached, in the radial direction, to grooves formed in the outer peripheral surface of the inner rotor, wherein a fluid is sucked through the inflow port of the casing into a space between the outer rotor and the inner rotor partitioned by the vanes, the fluid being discharged through the outflow port of the casing.
  • the present invention was conceived in view of the above problems. It is therefore an object of the present invention to provide a rotary compressor capable of significantly reducing the loss attributable to mechanical friction.
  • a rotary compressor comprising a casing having an inflow port and an outflow port for a fluid which open on its inner surface, a cylindrical outer rotor rotatably housed in the casing, and a cylindrical inner rotor rotatably supported at an eccentric position within the outer rotor, the rotors being rotated in a predetermined direction to introduce the fluid from the inflow port into a space between the rotors, the fluid being discharged through the outflow port, the improvement wherein the outer rotor has an inner peripheral surface provided with one or more protruding portions for partitioning which are radially inwardly raised and are circumferentially spaced apart from one another; and the inner rotor has an outer peripheral surface provided with one or more recessed portions for partitioning which are radially inwardly recessed and are circumferentially spaced apart from one another; and wherein the outer rotor and the inner rotor are connected to each other in such a manner that the protruding
  • rotations of the rotors allow a non-contact circular movement of the protruding portions for partitioning of the outer rotor along the inner surfaces of the recessed portions for partitioning of the inner rotor, with the result that a fluid from the inflow port is sucked into a space between the rotors partitioned by the protruding portions and the recessed portions for partitioning, the fluid being discharged through the outflow port.
  • the loss arising from mechanical friction is reduced to a large extent, making it possible to deal with the use in high-speed rotations, which is extremely advantageous to, e.g., superchargers for internal combustion engines.
  • FIG. 1 is a sectional side elevation of a rotary compressor showing an embodiment of the present invention
  • FIG. 2 is a sectional view taken along a line 5--5 of FIG. 1;
  • FIG. 3 is a front elevational view of the rotary compressor
  • FIG. 4 is an exploded perspective view of the major parts of the rotary compressor
  • FIG. 5 is an explanatory diagram of the action of the rotary compressor
  • FIG. 6 is a sectional plan view of a rotary compressor showing another embodiment of the present invention.
  • FIG. 7 is a sectional view taken along a line 15--15 of FIG. 6;
  • FIG. 8 is a sectional view taken along a line 16--16 of FIG. 6.
  • FIGS. 1 to 5 illustrate an embodiment of the present invention.
  • a rotary compressor according to this embodiment comprises a casing 1 constituting a compressor body, an outer rotor 2 rotatably housed in the casing 1, an inner rotor 3 rotatably supported at an eccentric position within the outer rotor 2, and a plurality of connecting plates 4 connecting the outer rotor 2 and the inner rotor 3 in a freely turnable state relative to each other.
  • the casing 1 is in the form of a hollow cylinder having one end which is opened and the other end which is provided with a bearing portion 1a for supporting the outer rotor 2.
  • the one end of the casing 1 is fitted with a casing cover 1b carrying a support shaft 1c for providing a support for the inner rotor 3.
  • the case cover 1b includes an inflow port 1d and an outflow port 1e which open into the interior of the casing 1, the inflow 1d and outflow 1e ports being connected to the exterior by way of a suction pipe 1f and a discharge pipe 1g, respectively.
  • the outer rotor 2 is in the form of a hollow cylinder having one end which is opened and the other end at which the outer rotor 2 is rotatably supported via a bearing 2a by the bearing portion 1a of the casing 1.
  • the outer rotor 2 has a support shaft 2b extending through its hollow and rotatably supported via a bearing 2c by the support shaft 1c of the casing cover 1b.
  • the support shaft 1c of the casing cover 1b is offset radially from the rotational center of the outer rotor 2.
  • the outer rotor 2 has on its inner peripheral surface a plurality of radially inwardly extending partition pieces 2d which are circumferentially spaced apart from one another in the shape of protruding portions for partitioning, the tip of each partition piece 2d being circular in section.
  • the inner rotor 3 is in the form of a hollow cylinder having open opposed ends and has the inner peripheral surface supported via a bearing 3a by the support shaft 1c of the casing cover 1b.
  • the outer peripheral surface of the inner rotor 3 is formed with a plurality of radial partition grooves 3b which are circumferentially spaced apart from one another in the shape of recessed portions for partitioning, with each partition groove 3b extending axially up to one end surface of the inner rotor 3.
  • the interior of each partition groove 3b is of a circular section, with part of its peripheral surface extending up to the outer peripheral surface of the inner rotor 3.
  • Each of the connecting plates 4 is in the form of a disk having an outer diameter equal to the inner diameter of the partition grooves 3b in the inner rotor 3.
  • Each plate 4 has at its one end a support shaft 4a rotatably connected via a bearing 4b to the interior of each partition groove 3b on the other end side thereof.
  • Each plate 4 has at its other end a pin 4c connecting to each partition piece 2d of the outer rotor 2 and rotatably supported by a bearing 4d, with the pin 4c being disposed on a predetermined circle around the support shaft 4a.
  • the rotors 2 and 3 rotate together, with at least two partition pieces 2d turning all the time along the inner surfaces of the associated partition grooves 3b in a non-contact manner, so that a fluid from the inflow port Id flows into a space A between the rotors 2 and 3 partitioned by the partition pieces 2d and the partition grooves 3b, the fluid being finally discharged through the outflow port 1e.
  • the plurality of partition pieces 2d formed on the inner peripheral surface of the outer rotor 2 are caused to perform circular movement in a non-contact manner along the inner surfaces of the plurality of partition grooves 3b formed in the outer peripheral surface of the inner rotor 3 so that the space between the rotors 2 and 3 can be partitioned without allowing the partition pieces 2d and the partition grooves 3b to come into contact with one another, thereby making it possible to remarkably reduce the loss arising from mechanical friction and to deal with the use in high-speed rotations.
  • the outer rotor 2 and the inner rotor 3 are coupled together by means of the connecting plates 4 so that the rotations of the connecting plates 4 allow circular movement of the partition pieces 2d of the outer rotor 2 along the inner surfaces of the partition grooves 3b of the inner rotor 3, with the result that application of rotational force to the outer rotor 2 can cause a rotation of the inner rotor 3.
  • the above embodiment is provided with a plurality of partition pieces 2d and a plurality of partition grooves 3b, it may have a single partition piece 2d and a single partition groove 3b.
  • FIGS. 6 to 8 illustrate another embodiment of the present invention.
  • a rotary compressor according to this embodiment comprises a casing 10 constituting a compressor body, an outer rotor 11 rotatably housed in the casing 10, an inner rotor 12 rotatably supported at an eccentric position within the outer rotor 11, and a pair of gears 13 and 14 for interlocking the outer rotor 11 and the inner rotor 12.
  • the casing 10 includes a bearing portion 10a and a support shaft 10b arranged at one end and the other end thereof, respectively, for providing a support for the inner rotor 12, and includes bearing portions 10c and 10d arranged at the other end thereof and internally at substantially the middle position, respectively, for providing a support for the outer rotor 11.
  • the casing 10 further includes in its peripheral surface an inwardly opened inflow port 10e and outflow port 10f which are circumferentially spaced apart from each other.
  • the outer rotor 11 is provided with one end 11a and the other end 11b which are disk-shaped and axially confront each other, and with a plurality of partition pieces 11c in the shape of protruding portions for partitioning which extend between the one end 11a and the other end 11b and are circumferentially spaced apart from one another.
  • the one end 11a of the outer rotor 11 is rotatably supported via a bearing 11d by the bearing portion 10d of the casing 10, the other end 11b being rotatably supported via a bearing 11e by the bearing portion 10c of the casing 10.
  • the plurality of partition pieces 11c are inwardly raised from the inner peripheral surface of the outer rotor 11, with their tips being circular in section.
  • a gear 11f is provided on the outer rotor 11 at the side of its one end 11a.
  • the inner rotor 12 has at its one end a support shaft 12a which is rotatably supported via a bearing 12b by the bearing portion 10a of the casing 10.
  • the inner rotor 12 has at its other end a bearing portion 12c which is rotatably supported via a bearing 12d on the support shaft 10b of the casing 10.
  • the inner rotor 12 is supported to be radially offset from the rotational center of the outer rotor 11.
  • the outer peripheral surface of the inner rotor 12 is formed with a plurality of partition grooves 12e which are radially recessed for partitioning and are circumferentially spaced apart from one another, the interior of each partition groove 12e being of a circular section.
  • a gear 12f is provided on the support shaft 12a of the inner rotor 12.
  • the support shaft 12a of the inner rotor 12 extends through the one end 11a of the outer rotor 11, with the gear 12f of the inner rotor 12 being coaxial with the gear 11f of the outer rotor 11.
  • Gears 13 and 14 are provided axially integrally with each other, with the both ends thereof being rotatably supported via bearings 13a and 14a, respectively, within the casing 10. That is, the gears 13 and 14 mesh with the gear 11f of the outer rotor 11 and the gear 12f of the inner rotor 12, respectively, so that the outer rotor 11 and the inner rotor 12 are rotated by way of the gears 13 and 14, respectively.
  • the outer rotor 11 and the inner rotor 12 are designed to have the same speed reduction ratio.
  • arrangement is such that rotations of the outer rotor 11 and the inner rotor 12 cause circular movement of the tips of the partition pieces 11c within the partition grooves 12e while being in close proximity to the inner surfaces of the partition grooves 12e. In this instance, an extremely minute gap is secured between the partition pieces 11c and the partition grooves 12e.
  • the outer rotor 11 when the inner rotor 12 is rotated by external rotational force, the outer rotor 11 can rotate in the same direction together with the inner rotor 12 since the outer rotor 11 is coupled via the gears 13 and 14 to the inner rotor 12. At that time, the rotors 11 and 12 rotate at positions offset relative to each other, so that the partition pieces 11c of the outer rotor 11 perform circular movement along the inner surfaces of the partition grooves 12e of the inner rotor 12 in a non-contact manner.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)
US09/036,786 1997-03-11 1998-03-09 Rotary compressor Expired - Fee Related US6039552A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9055797A JP3014656B2 (ja) 1997-03-11 1997-03-11 回転圧縮機
JP9-055797 1997-03-11

Publications (1)

Publication Number Publication Date
US6039552A true US6039552A (en) 2000-03-21

Family

ID=13008913

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/036,786 Expired - Fee Related US6039552A (en) 1997-03-11 1998-03-09 Rotary compressor

Country Status (6)

Country Link
US (1) US6039552A (zh)
EP (1) EP0864753A1 (zh)
JP (1) JP3014656B2 (zh)
KR (1) KR100286873B1 (zh)
CN (1) CN1077961C (zh)
TW (1) TW354818B (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6606973B2 (en) 2001-05-23 2003-08-19 Cordell R. Moe Rotary engine
US20120263617A1 (en) * 2010-03-15 2012-10-18 Tinney Joseph F Positive Displacement Rotary System
US8794941B2 (en) 2010-08-30 2014-08-05 Oscomp Systems Inc. Compressor with liquid injection cooling
US9267504B2 (en) 2010-08-30 2016-02-23 Hicor Technologies, Inc. Compressor with liquid injection cooling

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9811112D0 (en) * 1998-05-23 1998-07-22 Driver Technology Ltd Rotary machines
US6676392B1 (en) * 1999-04-23 2004-01-13 Dovicom Technol Co., Ltd. Small-sized compressor
WO2004090289A1 (en) * 2003-04-08 2004-10-21 Vittorio Patrono Rotary engine for motor vehicles with very low consumption and pollution rate
DE102012204500A1 (de) * 2012-03-21 2013-09-26 Mahle International Gmbh Pendelschieberpumpe
JP6108967B2 (ja) * 2013-06-06 2017-04-05 株式会社デンソー 回転型圧縮機構
GEP20207084B (en) * 2018-08-27 2020-04-10 Giorgi Chilashvili Five stroke rotary combustion engine, with volumetric expansion

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR672398A (zh) * 1929-12-31
GB396857A (en) * 1932-02-16 1933-08-17 Harry Sauveur Engine with rolling piston oscillating in a circle
US3847123A (en) * 1968-01-22 1974-11-12 R Vierling Rotary fluid power devices
US4125031A (en) * 1977-01-03 1978-11-14 Swain James C Coupler for two eccentrically rotating members
JPS59181284A (ja) * 1982-11-12 1984-10-15 チバ−ガイギ−・アクチエンゲゼルシヤフト 金属の様に導電する（２−フルオロ−５，６，１１，１２−テトラセレノテトラセン）↓２−臭化物、その製造方法および利用
JPS6380085A (ja) * 1985-08-20 1988-04-11 Yoshio Ono 吐流反作用吸収形ポンプ
US5658138A (en) * 1993-05-25 1997-08-19 Round; George F. Rotary pump having inner and outer components having abutments and recesses
US5720251A (en) * 1993-10-08 1998-02-24 Round; George F. Rotary engine and method of operation

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1610748A (en) * 1924-11-28 1926-12-14 Cozette Rene Jean Paul Emile Rotary machine
GB512250A (en) * 1937-03-06 1939-08-31 Tuda A G Improvements in or relating to prime movers, pumps and compressors having rotary pistons
US2336344A (en) * 1941-05-03 1943-12-07 Merrill August Rotary pump
US2755744A (en) * 1952-11-04 1956-07-24 Alvin G Halvorsen Rotary hydraulic ratio pump
US4958995A (en) * 1986-07-22 1990-09-25 Eagle Industry Co., Ltd. Vane pump with annular recesses to control vane extension
CA2189949A1 (en) * 1994-05-12 1995-11-23 Dong Il Hwang Vane pump
DE19532703C1 (de) * 1995-09-05 1996-11-21 Guenther Beez Pendelschiebermaschine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR672398A (zh) * 1929-12-31
GB396857A (en) * 1932-02-16 1933-08-17 Harry Sauveur Engine with rolling piston oscillating in a circle
US3847123A (en) * 1968-01-22 1974-11-12 R Vierling Rotary fluid power devices
US4125031A (en) * 1977-01-03 1978-11-14 Swain James C Coupler for two eccentrically rotating members
JPS59181284A (ja) * 1982-11-12 1984-10-15 チバ−ガイギ−・アクチエンゲゼルシヤフト 金属の様に導電する（２−フルオロ−５，６，１１，１２−テトラセレノテトラセン）↓２−臭化物、その製造方法および利用
JPS6380085A (ja) * 1985-08-20 1988-04-11 Yoshio Ono 吐流反作用吸収形ポンプ
US5658138A (en) * 1993-05-25 1997-08-19 Round; George F. Rotary pump having inner and outer components having abutments and recesses
US5720251A (en) * 1993-10-08 1998-02-24 Round; George F. Rotary engine and method of operation

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6606973B2 (en) 2001-05-23 2003-08-19 Cordell R. Moe Rotary engine
US20120263617A1 (en) * 2010-03-15 2012-10-18 Tinney Joseph F Positive Displacement Rotary System
US8683975B2 (en) * 2010-03-15 2014-04-01 Joseph F. Tinney Positive displacement rotary system
US8794941B2 (en) 2010-08-30 2014-08-05 Oscomp Systems Inc. Compressor with liquid injection cooling
US9267504B2 (en) 2010-08-30 2016-02-23 Hicor Technologies, Inc. Compressor with liquid injection cooling
US9719514B2 (en) 2010-08-30 2017-08-01 Hicor Technologies, Inc. Compressor
US9856878B2 (en) 2010-08-30 2018-01-02 Hicor Technologies, Inc. Compressor with liquid injection cooling
US10962012B2 (en) 2010-08-30 2021-03-30 Hicor Technologies, Inc. Compressor with liquid injection cooling

Also Published As

Publication number Publication date
EP0864753A1 (en) 1998-09-16
JP3014656B2 (ja) 2000-02-28
CN1193081A (zh) 1998-09-16
KR19980080059A (ko) 1998-11-25
CN1077961C (zh) 2002-01-16
TW354818B (en) 1999-03-21
JPH10252671A (ja) 1998-09-22
KR100286873B1 (ko) 2001-05-02

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